package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Override
    @Transactional
    public void submit(Orders order) {
        //获得当前用户id
        Long currentId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId,currentId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(qw);
        if(shoppingCartList==null||shoppingCartList.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户信息
        User user = userService.getById(currentId);
        //查询地址数据
        Long addressBookId = order.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook==null){
            throw new CustomException("地址有误，不能下单");
        }
//        获取总金额
//        AtomicInteger:原子操作。保证线程安全
        long orderId = IdWorker.getId();//订单号，非订单id
        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetails = shoppingCartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        //向订单表插入数据，一条数据

        order.setId(orderId);
        order.setNumber(String.valueOf(orderId));
        order.setOrderTime(LocalDateTime.now());
        order.setCheckoutTime(LocalDateTime.now());//支付时间
        order.setStatus(2);//在派送
        order.setAmount(new BigDecimal(amount.get()));//总金额
        order.setUserId(currentId);
        order.setUserName(user.getName());
        order.setConsignee(addressBook.getConsignee());
        order.setPhone(addressBook.getPhone());
        order.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        this.save(order);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(qw);
    }
}
